The Adsorptive Ability of 3D Flower-Like Titanium Phosphate for U(VI) in Aqueous Solution
The Adsorptive Ability of 3D Flower-Like Titanium Phosphate for U(VI) in Aqueous Solution
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DOI：
10.1007/s11270-020-04817-2
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发表时间：
2020-08
期刊：
影响因子：
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通讯作者：
Youqun Wang;Dejun Zeng;Ying Dai;Chenglei Fang;Xuewen Han;Zhibin Zhang;Xiaohong Cao;Yunhai Liu-Yunhai-Li
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文献类型：
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作者：
Youqun Wang;Dejun Zeng;Ying Dai;Chenglei Fang;Xuewen Han;Zhibin Zhang;Xiaohong Cao;Yunhai Liu-Yunhai-Li
以钛酸四丁酯（TBOT）和浓磷酸为原料，制备了三维花状纳米结构的磷酸钛（F-TiP/T，T为制备温度，单位为摄氏度）。用F-TiP/T去除U（VI）。此外，还考察了制备温度、溶液初始pH值、F-TiP/T吸附U（VI）的动力学和热力学等因素对吸附效果的影响。SEM和XRD表征结果表明，F-TiP/T的形貌为花状，物相为Ti（HPO 4）2·2 H2O。吸附过程符合准一级动力学模型和Sips模型，饱和吸附容量为295.13 mg·g-1。F-TiP/T对U（VI）的萃取主要是离子交换作用。上述结果表明，F-TiP/T是一种潜在的高效U（VI）吸附剂，可用于废水中U（VI）的去除和固定。
In the present work, 3D flower-like nanostructure titanium phosphates (F-TiP/T; T is the temperature of preparation in Celsius) were prepared through the reaction of tetrabutyl titanate (TBOT) with concentrated phosphoric acid. And F-TiP/T were applied to remove of U(VI). Furthermore, the effects of the preparation temperature, initial solution pH, and the kinetics and thermodynamics of U(VI) adsorbed by F-TiP/T were comprehensively explored. The characterization results of SEM and XRD indicated that the morphology of F-TiP/T was flower-like with a phase of Ti(HPO4)2•2H2O. Moreover, the adsorption results indicated that the processes were fitting to pseudo-first-order and Sips models and the saturated adsorption capacity was recorded as 295.13 mg·g−1. The extraction of U(VI) on F-TiP/T was dominated by ion exchange. The results above indicate that F-TiP/T is a potentially efficient U(VI) adsorbent, which could be utilized in the removal and immobilization of U(VI) in wastewater.